I downloaded "Xia Hou" by Constellation Peter in Quick Play and set it to full screen mode. How to recover?

Do you mean to change back to small window mode?

Open the game, press F 1 on the keyboard, and you will see the game settings. See the first setting panel in the upper left corner to visually display the settings, and there are two lines below. The first line is screen mode followed by two options. Just click on the second option window, ww.

Operation induction: Open the game →F 1 key → Visual display settings → Picture mode →■ window.

Of course, if you want to view other shortcut keys, you can press F 12 to browse the shortcut key ww, so that you can operate where the mouse can't click.

I wish I could help you.